問題詳情

6. Because unvented gas fireplaces exhaust directly into the room rather than outside, they also emit pollutants which may _____ some health risks.
(A) run
(B)vent
(C) entail
(D) include

參考答案

答案:C
難度:適中0.55
統計:A(2),B(1),C(11),D(2),E(0)

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